Domain. 1. When referring to an Internet address or name a domain or domain name is the location of a website. For example, the domain name computerhope.com points to the IP address 69.72.169.241, but it is generally easier to remember a name rather than a long string of numbers.omain. 1. When referring to an Internet address or name a domain or domain name is the location of a website. For example, the domain name computerhope.com points to the IP address 69.72.169.241, but it is generally easier to remember a name rather than a long string of numbers.
They are most commonly found in bacteria as small, circular, double-stranded DNA molecules; however, plasmids are sometimes present in archaea and eukaryotic organisms. In nature, plasmids often carry genes that may benefit the survival of the organism, for example antibiotic resistance.he normal number of copies of plasmid that may be found in a single cell is called the copy number, and is determined by how the replication initiation is regulated and the size of the molecule. Larger plasmids tend to have lower copy number.
Plasmids have been key to the development of molecular biotechnology. They act as delivery vehicles, or vectors, to introduce foreign DNA into bacteria. Using plasmids for DNA delivery began in the 1970s when DNA from other organisms was first âcut and pastedâ into specific sites within the plasmid DNA.his sits in the cytoplasm of the bacterial cell. In addition to the chromosome, bacteria often contain plasmids â small circular DNA molecules. Bacteria can pick up new plasmids from other bacterial cells (during conjugation) or from the environment.